Cache
From Phoenix Cart User Guide
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Administration
From admin go to 
Configuration → Cache to see this:
To make your website faster, some website elements are cached i.e. stored after first upload so they do not need to be uploaded again. There is no requirement to change the default settings here unless you know better.
Phoenix Cart User Guide, like CE Phoenix Cart, is free to use but is maintained by unpaid volunteers.
All other content is the reserved Intellectual Property and Copyright of phoenixcart.org
